PLUMBING & DRAINAGE
KNOWLEDGE IS POW…PROFIT M
erchant staff are quite often expected to be the font of all knowledge on every product they stock. That can be a very steep learning curve given the vast array of items sold in builders
and plumbers merchant outlets.
When it comes to macerators, pumps, lifting stations – hardly the sexiest products on the shelves – there is also the issue of building regulations that not all installers or plumbers may consider before buying. It’s possibly worth a merchant double checking with the customer before making a sale.
Amanda Mills, marketing manager at Saniflo, says: “There’s no doubting just how useful the products are though – particularly when gravity drainage is not an option. Love them or hate them, they are able to transform unused spaces and help to add extra facilities to buildings, gardens, leisure locations and more. “From products that can take waste from whole buildings, to products that take waste from a single WC, knowing ‘the rules’ can make sure the right solution is supplied at the point of sale.”
A statutory requirement….
To ensure that buildings are designed and constructed in accordance with regulations and associated legislation, as well as to protect the health and safety of building users, the projects that require approval include: Erection of a new building, Extension or alteration of an existing building, Loft conversions, Plumbing, drainage and ventilation windows and fuel burning appliances of any type, Many types of electrical works on buildings.
For projects that require a macerator, pump and/or lifting station it is mandatory to adhere to Part G and Part H. Whilst the customer is ultimately responsible for ensuring compliance, merchants, plumbers, contractors and installers should still be fully aware of the regulations.
Part G and Part H Building Regulations
Part G covers sanitation, hot water safety and water efficiency. And, when adding facilities and discharging to a drain, part 4.24 is the key regulation to understand; A WC fitted with a macerator and pump may be connected to a small bore drainage system discharging to a discharge stack if: There is also access to a WC discharging directly to a gravity system, and the pump meets the requirements of BS EN 12050-1:2001 Part 5.10 stipulates that a sanitary appliance used for personal washing fitted with a macerator and pump may be connected to a small bore drainage system discharged to a discharge stack if there is also access to washing facilities discharging directly to a gravity system and the macerator and pump meet the requirements of BS EN 12050-2:2001 Part H covers drainage & waste disposal and states thatt, where gravity drainage is impractical, a pumping solution will be needed. This should conform to BS EN 12050 in basements and BS EN 12056-4 for pumps located inside buildings Lifting station/pump installations for outside buildings should refer to BS EN 752 – 6 for guidance on design Where foul water is to be pumped, the effluent receiving chamber should be sized to contain a 24hr inflow to allow for disruption in service. The minimum daily discharge of foul drainage should be taken as 150 litres per head per day for domestic use. For other types of building the capacity of the receiving chamber should be based on the calculated daily demand of the water intake for the building. Where only a proportion of the foul sewage is to be pumped, then the capacity should be pro-rata. In all pumped systems the controls should be arranged to optimise operation.
For merchants wishing staff to gain a CPD in this subject, Saniflo has developed a CIBSE-approved programme. BMJ
ULMA SOLVES THE SLOPE DILEMMA B 30
y installing channels with a built-in slope, drainage specialists ULMA has solved many drainage projects where the surface area did not have any slope. There are three types of built-in slope products: pre-sloped offers channels of variable height with a built-in slope of 0,5% and 2,5%, according to the model, cascade slope offers a combination of straight channels of various heights that are joined using step connectors, and mixed slope, a combination of the first two, particularly useful for draining long length stretches.
Two of ULMA’s most popular families of channels have models with built-in slope, with which they manage to create inclination where it does not exist but where it is needed.
The Multi V+ range has channels with a built-in slope of 0.5% up to class D400 in its 3 models of width 100, 150 and 200. Where the project requires a higher load capacity, there is the CIVIL F range, which has a real pre-slope of 2.5%. This range goes up to load class F900.
The CIVIL F channels provide greater hydraulic capacity, because with the pre-slope, water runs faster, and drains more, in the same way as if larger channels had been installed. It also saves on cleaning and maintenance because, thanks to the speed of the water, it carries away the accumulated sediments, and creates a self- cleaning effect.
The CIVIL F range has been used in installations including the Silvertown Tunnel
Rules and regulations can sometimes get in the way of a good time. However, it is important to know the boundaries with which certain products can operate.
in London, the Pontypridd High School in Wales, the Port of Naples in Italy, Hotel Vela in Barcelona, and Krakow Arena in Poland. BMJ
www.buildersmerchantsjournal.net June 2024
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